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'eoCoguaC?ecfrnus Inc Page 3 <br /> Additional Investigation Work Plan <br /> Cardoza(Main St) <br /> Project No 662 2 <br /> January 15,2001 <br /> ' Detection Limits - <br /> oi µg KgI'OGO <br /> 2.3 Groundwater Sample Analyses <br /> ' One groundwater sample from each borehole will be submitted to Sherwood Laboratories of <br /> Hilmar (State Certified Laboratory #1400) and analyzed for <br /> • Benzene, toluene, ethylbenzene and xylene (BTEX)by EPA method 602 <br /> ' • Gasoline range petroleum hydrocarbons (TPH-Gas)by EPA method 5030/8015(m) <br /> • MTBE, DIPE, ETBE, TAME and TBA by EPA method 8260 <br /> The detection limits for these compounds are listed below A Chain of Custody will be <br /> completed for all samples collected and tracked to ensure sample integrity <br /> Detection Limits 13TEX oxygenates 'r H-Ciasoline <br /> Water pg <br /> 3.0 SCHEDULE & REPORTING <br /> Geological Technics Inc anticipates beginning field work no later than 30 days after <br /> USTCFP approval and upon issuance of the drilling permit The information gathered <br /> during this phase of work will be presented in a report, which will include a summary of the <br /> geology as well as the results of sample analyses Based on this information, GTI will <br /> propose the installation of additional monitoring wells to define the lateral and vertical <br /> extent of the groundwater plume Dr Ray Kablanow, a registered professional geologist, <br /> will supervise the project Copies of the report will be forwarded to both the appropriate <br /> County and State regulatory agencies (SC PHS/EHD and CRWQCB) <br />